I am a rank amateur offering to pay 10c a plane mile.
Wired Magazine on "mileage runners":
"I brag ...: "4.3 cents per mile. Pretty good, right?
Um, I think everyone defines 'good' a little bit differently," he says kindly, before explaining that he typically won't do mileage runs that come in at more than 2 cents a mile. "
Seriously, with all the other travel I do, no such runs for me. And as some of the readers comment, with concerns about global warming I would get a twinge of guilt today.
But in my younger days ago did a few of these - Pan Am just called them round-the-world fares back then....